This plugin depends on python-twitter (>= 1.1) and python-request-oauthlib

Configuration:

1. Authenticate with twitter account
Run:
$ bzr twitter-auth
This command returns the address of the authentication page.
Please open it and copy the pin code to the terminal.

2. Setup twitter branch id
This plugin tweets like the following message:
bzr commit: BRANCHID has the new revid: 10: example commit [bzr-tweet]
You can set BRANCHID using the following command:
$ bzr twitter-branchid BRANCHID
You must set it, otherwise this plugin doesn't work.